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//generalAppDomain.CurrentDomain.BaseDirectoryEnvironment.CurrentDirectory//Get Application Full Path(EXE, DLL, Service..)System.Reflection.Assembly.GetExecutingAssembly().LocationSystem.IO.Path.GetDi

private void textBox1_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e){    e.Handled = !        (char.IsDigit(e.KeyChar) || e.KeyChar.ToString() == "." || e.KeyChar == 8);}

 StringBuilder newFile = new StringBuilder();string temp = "";string[] file = File.ReadAllLines(@"C:/Documents and Settings/john.grove/Desktop/1.txt");foreach (string line in file){    if (line.Contai

 using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Data;names

         private void SendMail(string smtpHost, string sender,            string[] receivers, string subject, string content)        {            try            {                SmtpClient client = ne

         private void frmMain_Closing(object sender, System.ComponentModel.CancelEventArgs e)        {            this.Hide();            e.Cancel = true;        }

using System;using System.Collections.Generic;using System.Text;using System.Windows.Forms;using System.Runtime.InteropServices;using System.IO;namespace FormSetting{    class UIPersist    {        [D

  static void Test1()        {            List list1 = new List();            list1.Add("2009/08/03");            list1.Add("2009/8/4");            list1.Add("2009-08-05");            list

WebClient.DownloadFile

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Net;using System.Net.Sockets;namespace

class Customer { public int ID { get; set; } public string Name { get; set; } } class Order { publ

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace LinqInAction{ class ProcessData {

private long CountLine(string fileName){    using(StreamReader sr = new StreamReader(                new FileStream(fileName,FileMode.Open,                FileAccess.Read, FileShare.ReadWrite)))    { 

             // (1)            OleDbDataAdapter da = new OleDbDataAdapter(                "select * from jobs;select * from employee", //invalid OLE DB SQL ?                "provider=Microsoft

start a new instance of the program and close the old one Process.Start(Application.ExecutablePath,Process.GetCurrentProcess().Id.ToString());this.Close();

deploy crystal report for .net 20031)New a setup project2)Right click project, add 4 "Merge Modules"Crystal_Database_Access2003.msmCrystal_Database_Access2003_enu.msmCrystal_Managed2003.msmCrystal_reg

private void ShowMDIChild(Type formType){    foreach (Form f in this.MdiChildren)    {        if (f.GetType() == formType)        {            f.BringToFront();            f.WindowState = FormWindowSt

1) Create stored procedure2) Create Crystal report file using the stored procedure    Crystal report will auto import all storedproc parameters into report parameters3) Invoke *.rpt file.    configure

1) DataAdapter + CommandBuilder    generate rubbish SQL, and if no primary key in data table, it will fail2) manual construct SQL insert/update/delete    not efficient, expecially in case of batch upd

1) add service2) add project installer    //set install account    this.serviceProcessInstaller1.Account = System.ServiceProcess.ServiceAccount.LocalSystem;    this.serviceProcessInstaller1.Password =

ImageList of generic base form can not be protected.because when you subclass from baseform, you have get a snap shot of the imagelist,if you modify the base form imagelist afterward, the modification

using System;using System.Data;using System.IO;using System.Xml;namespace ConsoleApplication1{    class Class1    {        [STAThread]        static void Main(string[] args)     

using System;using System.Data;using System.IO;using System.Diagnostics;namespace ConsoleApplication1{    class Class1    {        [STAThread]        static void Main(string[] args)        {          

Exception HandlingAny try/catch/finally blocks in scope when a thread is created are of no relevance once the thread starts executing. Consider the following program:public static void Mai

The concept is originated from "Practise StateCharts in C++", where author use member function pointer to represent state pattern.c# version, more easy to illustrate///////////////////////////////////

using NLog;using NLog.Targets;using NLog.Layouts;FileTarget target = new FileTarget(); target.FileName = "${basedir}/log.csv"; // where to store the archive files target.ArchiveFileName = "${basedir}/

// popup message modeless dialog static void PopUpMsg(string msg) { TextBox editBox = new TextBox(); editBox.ReadOnly = true; editBox.Multiline = tr